Laminated Piezoelectric Element, Jetting Device Provided With the Laminated Piezoelectric Element, and Fuel Jetting System
AssigneeKYOCERA Corporation
InventorsTakeshi Okamura, Ichitaro Okamura
Life of this patent
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Abstract
A laminated piezoelectric element having a laminated structure in which a plurality of piezoelectric layers and a plurality of internal electrodes are alternately laminated is provided. This laminated structure has an opposing section wherein an internal electrode on an anode side and an internal electrode on a cathode side which are adjacent to each other in the laminating direction, oppose in the laminating direction, and an end-side non-opposing section situated in a position closer to end in the laminating direction than the opposing section. This end-side non-opposing section has a porous section having porosity larger than that of the internal electrodes.
Claims21
A laminated piezoelectric element, comprising:
- a laminated structure comprising:
- an opposing section comprising:
- a plurality of internal electrodes comprising a plurality of anode side internal electrodes and a plurality of cathode side internal electrodes;
- and
- a plurality of piezoelectric layers alternately laminated with the plurality of internal electrodes, wherein the anode side internal electrodes and the cathode side internal electrodes are located adjacent to each other and oppose each other respectively in a laminating direction;
- and
- at least one non-opposing section comprising at least one porous section having a porosity larger than a porosity of each of the internal electrodes.
A laminated piezoelectric element, comprising:
- an opposing section comprising:
- a plurality of internal electrodes comprising a plurality of anode side internal electrodes and a plurality of cathode side internal electrodes;
- and
- a plurality of piezoelectric layers alternately laminated with the plurality of internal electrodes, wherein the anode side internal electrodes and the cathode side internal electrodes are located adjacent to each other and oppose each other respectively in a laminating direction;
- and
- at least one non-opposing section comprising at least one porous section means operable to reduce deterioration of the laminated piezoelectric element.
A displacement characteristic stabilization method for a laminated piezoelectric element, the method comprising:
- forming an opposing section comprising:
- a plurality of internal electrodes comprising a plurality of anode side internal electrodes and a plurality of cathode side internal electrodes;
- and
- a plurality of piezoelectric layers alternately laminated with the plurality of internal electrodes, wherein the anode side internal electrodes and the cathode side internal electrodes are located adjacent to each other and oppose each other respectively in the laminating direction;
- and
- forming at least one non-opposing section comprising at least one porous section having a porosity larger than a porosity of each of the internal electrodes.
Dependencies are inferred from the claim text.